| Division 15 | | | Mechanical |
| 15050 | | Basic Mechanical Materials and Methods |
| 15100 | | Building Service Piping |
| 15200 | | Process Piping |
| 15300 | | Fire Protection Piping |
| 15400 | | Plumbing Fixtures and Equipment |
| 15500 | | Heat-Generation Equipment |
| 15600 | | Refrigeration Equipment |
| 15700 | | Heating, Ventilating, and Air Conditioning Equipment |
| 15800 | | Air Distribution |
| 15900 | | HVAC Instrumentation and Controls |
| 15950 | | Testing, Adjusting, and Balancing |
